Jessie live on UEFI systems

According to the Debian Wiki,
you can't boot a Debian Live based on Jessie on a UEFI system:

UEFI support in live images
At this point, UEFI support exists only in Debian's installation images. The
accompanying live images do not have support for UEFI boot, as the live-build
software used to generate them still does not include it. Hopefully the
debian-live developers will add this important feature soon.